static void Main(string[] args)
{
var duck = new Duck();
var plane = new Airplane();
var helicopter = new Helicopter();
//you can build a collection of all the things that implement the IFlyable interface:
var flyingThings = new List <IFlyable> {
duck, plane, helicopter
};
foreach (var thing in flyingThings)
{
//pattern matching: check if this thing we are on is using the ITakeOff interface and if yes, put it in the takeOff variable and then let me use it:
if (thing is ITakeOff takeOff)
{
takeOff.TakeOff("Bahamas");
}
thing.Fly();
}
}